Microeconometric Analysis of Telecommunication Services Market with the use of SARIMA Models

The paper presents the results of testing the effectiveness of the multi sectional model in the short-term forecasting of hourly demand for telephone services. The model was based on the integration of the linear regression model with dichotomous independent variables and the SARIMA model. The regression was used as a filter of modelled variability of the demand. The SARIMA was applied to model residual variability. The research shows that the proposed integration provides a greater possibility of approximation and prediction in comparison to the non-supported linear regression model. The results of the study provide support for operational planning of telecommunications operator

Emigration From Post-Communist Central Europe After 1989 Interpreted Within the Aspirations/Capabilities Framework

In the period of post-communist transition, Central Europe witnessed complex and multifaceted mobility processes; permanent outmigration, of an ethnic or labour-related nature, coexisted with temporary, seasonal, or cross-border movements and an increasing influx of foreigners. To study these complex processes, we have chosen to apply a holistic and comprehensive approach, rather than limit conceptual considerations to one theory of migration determinants. We focus on eleven post-communist countries that joined the European Union (EU-11) and on the period extending from around 1989, covering the EU's eastward enlargement, to the present. The aim of this study is twofold: first, we propose a general conceptual framework, based on the aspirations/capabilities approach, to present the main determinants of emigration from this part of the European continent. Second, in relation to each determinant, we formulate research questions postulated by selected theories of international migration and present the evidence, based on existing empirical studies, that addresses these questions. The paper contributes to the literature by providing a broad interpretation of post-transition mobility and pointing to commonly overlooked explanatory factors. We highlight the importance of economic factors that have enhanced and directed the outward migration from the EU-11 to selected EU member states and selected economic sectors; in particular, as regards capabilities, these factors include the lifting of labour market restrictions, high demand in the secondary sector of labour markets, and the roles of migration networks and the migration industry. Emphasis is also placed on aspirational factors, such as labour market failures and the substantial aspirational gap resulting from improvements in high educational attainment in the countries of origin. The aspirations/capabilities approach serves well as a general framework of migration determinants, but its explanatory power is enhanced by reference to other, more specific theories of migration. We show that a combination of the complementary approaches provides a more refined and in-depth picture of migration from the region

Recent trends in international migration in Poland: The 2012 SOPEMI report

This paper is a SOPEMI report for Poland for 2012. It presents the most important recent developments in migration policy and migration trends to and from Poland. It includes a brief analysis of recent economic developments shaping migration from and into Poland, changes in migration policy of Poland, recent trends in the transborder mobility, emigration from Poland and immigration to Poland. It concerns, among others, the newly published results of the 2011 population census. Additional in-depth analysis of the 2011 regularization action in Poland assesses its rationale, application and short- and long-term impacts.The statistical annex includes all data concerning the recent trends in migration from and into Poland

Ocena stopnia realizacji polityki telekomunikacyjnej w zakresie Strategii regulacyjnej do roku 2015

The purpose of this article is to analyze the progress in the telecommunications policy in Poland narrowed down to the objectives enunciated in the Regulatory Strategy until 2015.In the article the thesis that the current progress in the regulatory strategy is gratifying was confirmed. In the theoretical part the telecommunications policy and its role in the economic development are defined as well as the location of the policy in the classification of public policy is indicated. Furthermore, telecommunications market authorities, which are responsible for creating and conducting the policy in the telecommunication sector, are characterised. In the empirical part, which is based on the quantitative data, the foregoing values of indicators showing the progress in meeting the strategy objectives are presented. The conducted quantitative analysis is extended to the actions taken by the Office of Electronic Communications in order to implement the strategy.Celem artykułu jest analiza stopnia realizacji polityki telekomunikacyjnej w Polsce w zawężeniu do celów sformułowanych w Strategii regulacyjnej do roku 2015. W artykule pozytywnie zweryfikowano tezę, że poziom dotychczasowego wykonania obecnej strategii regulacyjnej jest zadowalający. W części teoretycznej zdefiniowano politykę telekomunikacyjną, dokonano analizy znaczenia tej polityki w rozwoju gospodarczym, a także określono jej lokalizację w klasyfikacji polityki publicznej. Ponadto, scharakteryzowano podstawowe instytucje władcze rynku telekomunikacyjnego, które są odpowiedzialne za kreowanie i realizację polityki prowadzonej w sektorze telekomunikacyjnym. W części empirycznej, opartej na danych ilościowych, zaprezentowano wartości mierników stopnia realizacji celów badanej strategii regulacyjnej. Przeprowadzoną analizę ilościową poszerzono o podejmowane przez Urząd Komunikacji Elektronicznej działania na rzecz realizacji strategii

Application of the Linear ordering Methods in the Voivodships Research in the Field of Social Media Usage in Enterprises in the Period 2014-2017

Aim/purpose - The aim of this paper is to analyze and compare the development of voivodships in terms of social media usage in enterprises in the period from 2014 to 2017. The aim has been formulated because of the increasingly greater significance of social media in post-industrial enterprises. Design/methodology/approach - The two types of linear ordering methods were applied, i.e., the method based on the pattern of development (Hellwig's method) and the methods that were non-based on the pattern of development were used. Spearman's rank correlation coefficient ρ and Kendall's rank correlation coefficient τ were used to verify correlations between various rankings. Analysis of the dynamics, spatial visualizations, box plots and polar plots were used in relation to the aggregated measures. In conducted analyses, data from the period 2014-2017 (provided by the Central Statistical Office of Poland) was used. The each year for the period from 2014 to 2017 was analyzed. Findings - In all rankings (with the use of all types of applied measures and also in all analyzed years) the 1st place was taken by Masovian Voivodship. The distance between Masovian Voivodship and other voivodships was still significant during the analyzed period. The created rankings were similar in terms of statistical significance of computed correlation coefficients in all analyses. The research study results do not indicate a clear dispersion of the level of the analyzed phenomenon between eastern and western voivodships. It was also found that the higher is ICT usage by enterprises in a voivodship, the more common is social media usage by them. There is a clear overall tendency of increase in the phenomenon during the period from 2014 to 2017.Research implications/limitations - The main implications is that the identified differences between areas can be a basis to assess the social media usage as a specific factor of business development. The research results indicate voivodships that should employ social media more and the highest placed voivodships as well. The results can be regard as support for the policy of digitization and building a knowledge-based economy. Originality/value/contribution - The originality of this paper is based on: the created rankings of voivodships in terms of social media usage in enterprises in the period 2014- 2017, the comparison and assessment of voivodships in this context, and the identification of change of the social media usage in individual voivodships and in Poland as a whole.(original abstract

Microcirculation disorders of the oral cavity in patients with primary Raynaud phenomenon

Raynaud phenomenon is a medical condition in which the spasm of the arteries causes episodes of reduced blood flow. Potential disorders in the microcirculation of the oral mucosa may promote the occurrence of lesions. The aim of the study was to investigate the association of the frequency of oral cavity lesions with oral microcirculatory dysfunction in patients with primary Raynaud phenomenon (PRP) in comparison with healthy control group. Measurements of oral capillary flow were performed using laser doppler flowmetry (LDF) in 61 patients with PRP. In a group of 31 of 61 patients (group 1), the measurements were made during a Raynaud phenomenon (RP) attack. The RP attack was caused by stress initiated by the examination or the first visit itself. The RP attack was not deliberately caused by a cold test, vibration40w56 or any stress test. After 10 to 14 days, the measurements were repeated in all 61 patients and in the control group, and a dental examination was performed. Follow‑up visits were conducted every 3 months for a period of 12 months to monitor oral mucosa. Differences in LDF were found between various anatomical points in both the PRP and control groups. On the first visit, the LDF flow in group 1 was significantly lower at all examined points in comparison with those in the control group. On the second visit, differences were observed in the LDF of the teeth and oral mucosa temperature in all patients with PRP in comparison with controls. Oral cavity lesions reported in the past and at follow‑up were significantly more common in patients with PRP. Patients with PRP have dysfunction in the microcirculation of the oral mucosa and they more often have lesions in the oral cavity

Labour mobility in the enlarged European Union: International migration from the EU8 countries

The present paper consists of an extensive description of recent migration in the 8 new European Union member countries which accessed the EU on May 1st, 2004. Since 1989 all of these countries experience an unique shift from socialist to market economy. The paper attempts to capture an interplay or correlation of pre- and post-enlargement developments with the phenomena of political and socio-economic transition on migration from and into this region